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Built-Ins and Attributed Variables
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<H2 CLASS="section"><A NAME="htoc226">16.8</A>&nbsp;&nbsp;Built-Ins and Attributed Variables</H2>
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<B>free(?Term)</B><DD CLASS="dd-description">
This type-checking predicate succeeds iff its argument is an
ordinary free variable, it fails if it is an attributed variable.<BR>
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<DT CLASS="dt-description"><B>meta(?Term)</B><DD CLASS="dd-description">
This type-checking predicate succeeds iff its argument is an attributed variable.
For other type testing predicates an attributed variable behaves like a variable.</DL>
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